Adytum was founded by the inhabitants of the demonstration Vault. The community was fairly self-sufficient, growing its own food and manufacturing ammunition from chemical components garnered on location, (from brahmin dung for example), to exchange for necessary supplies. Aside from the inhabitants eking out an existence, the Adytum is home to several scavengers under the informal leadership of Sammael, who comb the city for long lost artifacts and information.
The town was well-fortified, surrounded by a double chain-link fence and patrolled by armed Regulators. It became dependent on deliveries from the Hub when their hydroponic farms broke down, with the merchants abusing their position as the sole sustenance of the community, making a tidy profit on ammunition from Adytum.
The canonical outcome of the Vault Dweller's adventures in the Boneyard are not specified. The only available piece of information comes from his memoirs: I found many enemies, and a few friends, in the Boneyard. I killed when necessary and learned more about the nature of my true foes. It is not known for certain, however, whether the Vault Dweller did uncover the assassination of Zimmerman's son by the Regulators and their attempt at putting the blame on the Blades, nor whether Adytum was freed from Regulator rule.
The following is based on the Fallout Bible and is not considered canon.
If the Vault Dweller liberated Adytum from Regulators, Razor will come, offer thanks and stay in Adytum.
Should one try to give weapons (requires successful Reverse-pickpocket-ing, or exploitation of Combat mode) to the citizens of Adytum during the fight against the Regulators, their sprites for various weaponry have to be considered.